MS251 ignition coil?

[67L36Driver]

RPM limited?

This thing is driving me bonkers. [emoji2957]

 

[DND 9000]

It is electronically limited.

 

[Simondo]

MS-251 details .......

 

[67L36Driver]

Thanks fellas!

I think I have a bad coil as the high speed is two turns open but it sometimes cuts good with the bar buried and then cuts out at lower rpm no load. [emoji90]

 

[Simondo]

Thanks fellas!

I think I have a bad coil as the high speed is two turns open but it sometimes cuts good with the bar buried and then cuts out at lower rpm no load. [emoji90]

Pain in the rump !! Hard to say what you are dealing with exactly ..but I still think its more likely to be carb . Coils are much less trouble over all.

 

[kyle.kipple]

Pain in the rump !! Hard to say what you are dealing with exactly ..but I still think its more likely to be carb . Coils are much less trouble over all.

Agreed. The littlest of crud in a carb cause can a lot of headache and tail chasing.


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[RedFir Down]

Thanks fellas!

I think I have a bad coil as the high speed is two turns open but it sometimes cuts good with the bar buried and then cuts out at lower rpm no load. [emoji90]

How old is the saw? Has there ever been Ethanol fuel used in it?

 

[67L36Driver]

How old is the saw? Has there ever been Ethanol fuel used in it?

Got me, I got it as a carcass the clutch had exploded on. Had to replace everything on the PTO side.

Dealer price for the freakin oil pump is $30. [emoji2960]

 

[RedFir Down]

Got me, I got it as a carcass the clutch had exploded on. Had to replace everything on the PTO side.

Dealer price for the freakin oil pump is $30. [emoji2960]

I see. I had a CS-490 act just like that 251 recently. I put a new carb kit as well as a new check valve/nozzle assembly in the carb and it runs like new. I believe ethanol ruins the check valves.
What carb is on the saw?

 

[67L36Driver]

Zama.

Runs and cuts well enuff.

It is rather wonky for the first five minutes. After you work it hard it straightens up and goes good.

Carb is 1 turn on the low and two on the high.

My luck with Zama has not been good. [emoji13]

 

[Simondo]

Zama.

Runs and cuts well enuff.

It is rather wonky for the first five minutes. After you work it hard it straightens up and goes good.

Carb is 1 turn on the low and two on the high.

My luck with Zama has not been good. [emoji13]

Fire up ok from cold with the choke/high idle setting and then knocking off the choke part with the leaver, just leaving it in high idle and pulling till it runs ?
Then how is it at starting from hot with just the lever in the run position.
Take it you haven't changed out the coil in the end.